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How to Upgrade Items in Pokemon GO Upgrade is among the most sought-after items of Pokemon GO. It allows trainers to transform Porygon2 into Porygon and progress in their Pokedex. It is a rare item, however it can be obtained by spinning a Photo Disc at a Pokestop, or as a prize at special events. But what exactly does this item actually do? Components Upgrade components are objects that can be put into trinkets, weapons or gathering tools in order to give an added bonus or eff